﻿<p>The <em>IfcDimensionCount</em> defins the dimensionality of the coordinate space. It is restricted to have the
dimensionality of either 1, 2, or 3 for the purpose of this specification.</p>
<blockquote class="note">NOTE&nbsp; The shape representations assigned to a geometric representation context may
include geometric representation items of lower dimensionality, particularly when defining the boundary of planar
surfaces as 2D cross sections for the purpose of 3D swept areas.</blockquote>

<blockquote class="extDef">NOTE&nbsp; Definition according to ISO/CD 10303-42:1992<br>
A dimension count is a positive integer used to define the coordinate space dimensionality.</blockquote>
<blockquote class="note">NOTE&nbsp; Type adapted from <strong>dimension_count</strong> defined in ISO
10303-42.</blockquote>
<blockquote class="history">HISTORY&nbsp; New Type in IFC1.5</blockquote>